Rises can be periodic.Logical formLearned from11 sentences. Flareups can be periodic.Logical formLearned from11 sentences. Cleanups can be periodic.Logical formLearned from11 sentences. A (refresher training) can be periodic.Logical formLearned from11 sentences. Cases can be periodic.Logical formLearned from11 sentences. Upsurges can be periodic.Logical formLearned from11 sentences. An exam can be periodic.Logical formLearned from11 sentences. A depression can be periodic.Logical formLearned from10 sentences. Winds can be periodic.Logical formLearned from10 sentences. (Fish kills) can be periodic.Logical formLearned from10 sentences. Collections can be periodic.Logical formLearned from10 sentences. Vibrations can be periodic.Logical formLearned from10 sentences. Syndromes can be periodic.Logical formLearned from10 sentences. Cruises can be periodic.Logical formLearned from10 sentences. A noise can be periodic.Logical formLearned from10 sentences.